88157989 has 2 divisors, whose sum is σ = 88157990. Its totient is φ = 88157988.

The previous prime is 88157987. The next prime is 88158023. The reversal of 88157989 is 98975188.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45360225 + 42797764 = 6735^2 + 6542^2 .

It is a cyclic number.

It is not a de Polignac number, because 88157989 - 2¹ = 88157987 is a prime.

Together with 88157987, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88157981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44078994 + 44078995.

It is an arithmetic number, because the mean of its divisors is an integer number (44078995).

Almost surely, 2^88157989 is an apocalyptic number.

It is an amenable number.

88157989 is a deficient number, since it is larger than the sum of its proper divisors (1).

88157989 is an equidigital number, since it uses as much as digits as its factorization.

88157989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 55.

The square root of 88157989 is about 9389.2485854833. The cubic root of 88157989 is about 445.0620441202.

The spelling of 88157989 in words is "eighty-eight million, one hundred fifty-seven thousand, nine hundred eighty-nine".